SPRINKLER TALK FORUM - You Got Questions, We've Got Answers

then your answer is no you will not damage or under perform if you stay within the 10 peercent rule, meaning if the the static is 62psi than your zone should not exceed 12gpm. that mmeans you can get away with the most 4 pgp with a nozzels at 4#7 or going along the fence at 30ft spaces corner #7 and middle #9 and corner #7 and with the little bit of 1/2 will not hurt your system. I use 1/2 poly from the pvc to the heads with the right barb fittings, i make them myself, or you can buy them already made. just trying to help.

i agree with jimmy...i use 1/2 on some of my I-20'S and didn't have a problem...makes install alot easier....